Support method of soft soil foundation pit without inner support
A foundation pit support and soft soil technology, which is applied in excavation, foundation structure engineering, construction, etc., can solve problems such as increasing project cost, interfering with underground structure construction, and environmental impact, so as to eliminate interference, improve construction efficiency, and reduce engineering costs. The effect of cost
Pending Publication Date: 2019-01-04
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology
The internal support system is composed of column piles, columns and horizontal support beams, which increases the cost of the project and reduces the excavation efficiency in the foundation pit
In addition, with the construction of the underground structure, the internal support also needs to be removed layer by layer, which affects the environment and interferes with the construction of the underground structure
Method used
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Embodiment 1
[0066] Embodiment 1, the soft soil foundation pit support method without internal support, such as figure 1 and 2 As shown, in the soft ground layer 7, excavating a foundation pit with a depth of H includes the following steps in sequence:
[0067] S1. Set vertical body I1 and vertical body II2 according to the actual needs of construction:
[0068] Set vertical body I1 on the side to be excavated, and the length of vertical body I1 is L 1 , the vertical body II2 is set on the outside, and the length of the vertical body II2 is L 2 ;
[0069] Note: The above-mentioned outside refers to the outside of the soft soil foundation pit, that is, the soft soil foundation pit is located inside the vertical body I1 and vertical body II2.
[0070] The tops of the vertical body I1 and the vertical body II2 are both flush with the ground 9, and L 2 less than or equal to L 1 , the vertical body I is parallel to the vertical body II, and their horizontal distance is s1.
[0071] L 1 ...
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Abstract
The invention discloses a support method of a soft soil foundation pit without inner support. The support method of the soft soil foundation pit without the inner support comprises the following stepsthat S1, a vertical body I and a vertical body II are arranged; S2, buttresses are arranged; S3, an inclined strut piece assembly is arranged, and the inclined strut piece assembly is composed of atleast two inclined strut pieces arranged in the length direction of a foundation pit; and the top ends of the inclined strut pieces and top end of the vertical body II are connected on the ground, thebottom ends of the inclined strut pieces are connected with the vertical body I, and the bottom ends of the inclined strut pieces are located below the excavation surface of the foundation pit; S4, an inclined pulling piece assembly is arranged, and the inclined pulling piece assembly is composed of inclined pulling pieces corresponding to the inclined strut pieces of the step S3 one to one; thetop ends of the inclined pulling pieces are connected with the top end of the vertical body I, the inclined pulling pieces intersect with the vertical body II, and an intersection point is A; the intersection point A is located below the excavation surface of the foundation pit; and the inclined strut pieces intersect with the inclined pulling pieces at point B; and S5, horizontal piece assembliesare arranged, specifically, the foundation pit with a depth of H is excavated downwards from the ground, and n-layer horizontal piece assemblies are arranged from top to bottom in sequence from a depth of a4 above the ground while excavating.
Description
technical field [0001] The invention relates to a foundation pit support method in the field of civil engineering, in particular to a soft soil foundation pit support method without internal support. Background technique [0002] In the foundation pit in soft soil, when the excavation depth is greater than 7m, it is necessary to use internal support to resist the earth pressure acting on the vertical support body, which is a passive support function. The internal support system consists of column piles, columns and horizontal support beams, which increases the project cost and reduces the excavation efficiency in the foundation pit. In addition, with the construction of the underground structure, the internal support also needs to be removed layer by layer, which affects the environment and interferes with the construction of the underground structure. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a foundation...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 马海龙马宇飞
Owner ZHEJIANG SCI-TECH UNIV